Apparatus for vulcanizing rubber goods



June 10, 1924 P. M. MATTHEW APPARATUS FOR VULCANIZING RUBBER GOODS Filed Aug. 22 1922,

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APPARATUS FOR VULCANIZING RUBBER GOQDS.

Application filed August 22, 1922. Serial No. 588,520.

This invention relates to a process of and' apparatus for the vulcanization of rubber goods, e. g., sheet rubber and textile fabrics combined with rubber, and aims at the continuous vulcanization of such materials as rubber coated floor-cloth, printers blanket,-

insertion sheet, belting, etc., which are ordinarily vulcanized under stationary pressure, the treatment being also applicable to iilizch goods as waterproof fabrics and the e. The process consists in passing the material to be vulcanized around a slowly rotating drum or cylinder of large diameter,

heated internally to the required temperature, and simultaneously therewith subjecting it to intermittent and rapidly recurring pressure against the surface of the heated drum, or cylinder, during the period of vulcanization, which may be varied according to the thickness of the material to be treated. The width of the'face of the drum or cylinder may be varied in accordance with the width of material to be treated.

The intermittent pressure is imparted by pressure rollers of any desired number which may be heated or not, as required.

The pressure rollers may be mounted in any convenient manner, but I prefer to arrange them so that their ends or journals are carried in bearings sustained bytwo rings coaxial with the drum or cylinder and dispgsed one at each end thereof, the rings ing oscillated by suitable mechanical means, at a higher speed than the speed of rotation of the drum, whereby the rollers are kept in motion to and fro over the outer surface of the material during its passa e over the drum or cylinder; the rollers hem thus bodily movable in an arcuate path coaxial with the drum or cylinder. 1

The rings may be centred on the shaft carrying the drum or cylinder or may have bearings on surfaces on the ends of the drum or cylinder.

The outer face of the cylinder may be polished, engraved, grained, figured or otherwise formed to impart any desired profile or facing to the vulcanized goods.

In the accompanying drawings Fig. 1 is a side elevation and Fig. 2 an end view of apparatus according to the invention.- Fig. 3- is a'detail view showing a modified arrangement for regulating the pressure of the rollers. I

The apparatusshown comprises a rotary drum or cylinder 1 of large diameter adapted to be heated internally to the required temperature, and pressure rollers 2 adapted to apply intermittent and rapidly recurring pressure to the goods interposed between the rollers 2 and the surface of the drum or cylinder 1. I

The ends or trunnions of the rollers 2 are carried in bearings sustained by two rings 3, 4 coaxial with the drum or cylinder 1 and disposed one at each end thereof, the rings 3, 4 being oscillated at high speed compared with the speed of rotation-0f the drum or cylinder 1.

In the form shown, carries a spur pinion 6 meshing with a large spur wheel 7 fixed on the shaft 8 carrying the drum or cylinder 1 and carries also a large spur wheel 9 meshing with a pinion 10 on a shaft 11 connected by a crank 12 and link 13' with a bar 14 sustained between the rings 3, 4.

The pressure of the rollers may be regulated by springs, screws, or other suitable means. Two arrangements for regulating the pressure are shown in Figs. 2 and 3. Elke regulating arrangements may be modi- I claim 1. Vulcanizing apparatus comprising a rotary drum and pressure rollers bodily movable in an arcuate path coaxial with said drum.

2. Vulcanizing ap aratus comprising a rotary drum aroun which is passed the material to be vulcanized, rings coaxial with said drum, bearings carried by said rings, pressure rollers mounted in said- .bearings and means for oscillating said rings.

3. Vulcanizing apparatus comprising a rotary drum and pressure rollers grouped around said drum, said rollers rotatable around their own axes and movable to and fro in a path coaxial with the drum.

4. Vulcanizing apparatus com rising a rotary drum, pressure rollers bodily movelole in en ereunte peth coexiel with seid drum, means for rot-etin the drum end means for imparting to it rollers bodily movement in ssid ercuete path at en angular s eed exceeding the angular speed of the rum,

5. Vulcenizing epperetus comprising at rotary drum, pressure rollers errenged in en ere coexinl with the drum, n support for said rollers and means for oscillating said support.

8. Vulennizing epperntus com rising e rotary drum, premure rollers istrihuted eround the peri hery of the drum and meens for moving sei' rollers to end fro eround the exis or the inemie 7. Vulcnnizing epperetus comprising 2 rotary drum, a wuss of pressure rollers each rotatable around an axis parallel with the axis of the drum, supporting menns IEorsnid 2o In testimony whereof I hnve signed my name to this specification in the presence of two subscribing Witnesses rnrnren MILLAR MATTHEW.

Witnesses:

'l. ll. Srrrrson Wrrrrnns, R. G, Pnnnrru 

